Index: node_modules/postcss/lib/stringifier.js
===================================================================
--- node_modules/postcss/lib/stringifier.js	(revision 2058e5c694bb6097866a5fe6503c519e8f74970f)
+++ node_modules/postcss/lib/stringifier.js	(revision 2058e5c694bb6097866a5fe6503c519e8f74970f)
@@ -0,0 +1,353 @@
+'use strict'
+
+const DEFAULT_RAW = {
+  after: '\n',
+  beforeClose: '\n',
+  beforeComment: '\n',
+  beforeDecl: '\n',
+  beforeOpen: ' ',
+  beforeRule: '\n',
+  colon: ': ',
+  commentLeft: ' ',
+  commentRight: ' ',
+  emptyBody: '',
+  indent: '    ',
+  semicolon: false
+}
+
+function capitalize(str) {
+  return str[0].toUpperCase() + str.slice(1)
+}
+
+class Stringifier {
+  constructor(builder) {
+    this.builder = builder
+  }
+
+  atrule(node, semicolon) {
+    let name = '@' + node.name
+    let params = node.params ? this.rawValue(node, 'params') : ''
+
+    if (typeof node.raws.afterName !== 'undefined') {
+      name += node.raws.afterName
+    } else if (params) {
+      name += ' '
+    }
+
+    if (node.nodes) {
+      this.block(node, name + params)
+    } else {
+      let end = (node.raws.between || '') + (semicolon ? ';' : '')
+      this.builder(name + params + end, node)
+    }
+  }
+
+  beforeAfter(node, detect) {
+    let value
+    if (node.type === 'decl') {
+      value = this.raw(node, null, 'beforeDecl')
+    } else if (node.type === 'comment') {
+      value = this.raw(node, null, 'beforeComment')
+    } else if (detect === 'before') {
+      value = this.raw(node, null, 'beforeRule')
+    } else {
+      value = this.raw(node, null, 'beforeClose')
+    }
+
+    let buf = node.parent
+    let depth = 0
+    while (buf && buf.type !== 'root') {
+      depth += 1
+      buf = buf.parent
+    }
+
+    if (value.includes('\n')) {
+      let indent = this.raw(node, null, 'indent')
+      if (indent.length) {
+        for (let step = 0; step < depth; step++) value += indent
+      }
+    }
+
+    return value
+  }
+
+  block(node, start) {
+    let between = this.raw(node, 'between', 'beforeOpen')
+    this.builder(start + between + '{', node, 'start')
+
+    let after
+    if (node.nodes && node.nodes.length) {
+      this.body(node)
+      after = this.raw(node, 'after')
+    } else {
+      after = this.raw(node, 'after', 'emptyBody')
+    }
+
+    if (after) this.builder(after)
+    this.builder('}', node, 'end')
+  }
+
+  body(node) {
+    let last = node.nodes.length - 1
+    while (last > 0) {
+      if (node.nodes[last].type !== 'comment') break
+      last -= 1
+    }
+
+    let semicolon = this.raw(node, 'semicolon')
+    for (let i = 0; i < node.nodes.length; i++) {
+      let child = node.nodes[i]
+      let before = this.raw(child, 'before')
+      if (before) this.builder(before)
+      this.stringify(child, last !== i || semicolon)
+    }
+  }
+
+  comment(node) {
+    let left = this.raw(node, 'left', 'commentLeft')
+    let right = this.raw(node, 'right', 'commentRight')
+    this.builder('/*' + left + node.text + right + '*/', node)
+  }
+
+  decl(node, semicolon) {
+    let between = this.raw(node, 'between', 'colon')
+    let string = node.prop + between + this.rawValue(node, 'value')
+
+    if (node.important) {
+      string += node.raws.important || ' !important'
+    }
+
+    if (semicolon) string += ';'
+    this.builder(string, node)
+  }
+
+  document(node) {
+    this.body(node)
+  }
+
+  raw(node, own, detect) {
+    let value
+    if (!detect) detect = own
+
+    // Already had
+    if (own) {
+      value = node.raws[own]
+      if (typeof value !== 'undefined') return value
+    }
+
+    let parent = node.parent
+
+    if (detect === 'before') {
+      // Hack for first rule in CSS
+      if (!parent || (parent.type === 'root' && parent.first === node)) {
+        return ''
+      }
+
+      // `root` nodes in `document` should use only their own raws
+      if (parent && parent.type === 'document') {
+        return ''
+      }
+    }
+
+    // Floating child without parent
+    if (!parent) return DEFAULT_RAW[detect]
+
+    // Detect style by other nodes
+    let root = node.root()
+    if (!root.rawCache) root.rawCache = {}
+    if (typeof root.rawCache[detect] !== 'undefined') {
+      return root.rawCache[detect]
+    }
+
+    if (detect === 'before' || detect === 'after') {
+      return this.beforeAfter(node, detect)
+    } else {
+      let method = 'raw' + capitalize(detect)
+      if (this[method]) {
+        value = this[method](root, node)
+      } else {
+        root.walk(i => {
+          value = i.raws[own]
+          if (typeof value !== 'undefined') return false
+        })
+      }
+    }
+
+    if (typeof value === 'undefined') value = DEFAULT_RAW[detect]
+
+    root.rawCache[detect] = value
+    return value
+  }
+
+  rawBeforeClose(root) {
+    let value
+    root.walk(i => {
+      if (i.nodes && i.nodes.length > 0) {
+        if (typeof i.raws.after !== 'undefined') {
+          value = i.raws.after
+          if (value.includes('\n')) {
+            value = value.replace(/[^\n]+$/, '')
+          }
+          return false
+        }
+      }
+    })
+    if (value) value = value.replace(/\S/g, '')
+    return value
+  }
+
+  rawBeforeComment(root, node) {
+    let value
+    root.walkComments(i => {
+      if (typeof i.raws.before !== 'undefined') {
+        value = i.raws.before
+        if (value.includes('\n')) {
+          value = value.replace(/[^\n]+$/, '')
+        }
+        return false
+      }
+    })
+    if (typeof value === 'undefined') {
+      value = this.raw(node, null, 'beforeDecl')
+    } else if (value) {
+      value = value.replace(/\S/g, '')
+    }
+    return value
+  }
+
+  rawBeforeDecl(root, node) {
+    let value
+    root.walkDecls(i => {
+      if (typeof i.raws.before !== 'undefined') {
+        value = i.raws.before
+        if (value.includes('\n')) {
+          value = value.replace(/[^\n]+$/, '')
+        }
+        return false
+      }
+    })
+    if (typeof value === 'undefined') {
+      value = this.raw(node, null, 'beforeRule')
+    } else if (value) {
+      value = value.replace(/\S/g, '')
+    }
+    return value
+  }
+
+  rawBeforeOpen(root) {
+    let value
+    root.walk(i => {
+      if (i.type !== 'decl') {
+        value = i.raws.between
+        if (typeof value !== 'undefined') return false
+      }
+    })
+    return value
+  }
+
+  rawBeforeRule(root) {
+    let value
+    root.walk(i => {
+      if (i.nodes && (i.parent !== root || root.first !== i)) {
+        if (typeof i.raws.before !== 'undefined') {
+          value = i.raws.before
+          if (value.includes('\n')) {
+            value = value.replace(/[^\n]+$/, '')
+          }
+          return false
+        }
+      }
+    })
+    if (value) value = value.replace(/\S/g, '')
+    return value
+  }
+
+  rawColon(root) {
+    let value
+    root.walkDecls(i => {
+      if (typeof i.raws.between !== 'undefined') {
+        value = i.raws.between.replace(/[^\s:]/g, '')
+        return false
+      }
+    })
+    return value
+  }
+
+  rawEmptyBody(root) {
+    let value
+    root.walk(i => {
+      if (i.nodes && i.nodes.length === 0) {
+        value = i.raws.after
+        if (typeof value !== 'undefined') return false
+      }
+    })
+    return value
+  }
+
+  rawIndent(root) {
+    if (root.raws.indent) return root.raws.indent
+    let value
+    root.walk(i => {
+      let p = i.parent
+      if (p && p !== root && p.parent && p.parent === root) {
+        if (typeof i.raws.before !== 'undefined') {
+          let parts = i.raws.before.split('\n')
+          value = parts[parts.length - 1]
+          value = value.replace(/\S/g, '')
+          return false
+        }
+      }
+    })
+    return value
+  }
+
+  rawSemicolon(root) {
+    let value
+    root.walk(i => {
+      if (i.nodes && i.nodes.length && i.last.type === 'decl') {
+        value = i.raws.semicolon
+        if (typeof value !== 'undefined') return false
+      }
+    })
+    return value
+  }
+
+  rawValue(node, prop) {
+    let value = node[prop]
+    let raw = node.raws[prop]
+    if (raw && raw.value === value) {
+      return raw.raw
+    }
+
+    return value
+  }
+
+  root(node) {
+    this.body(node)
+    if (node.raws.after) this.builder(node.raws.after)
+  }
+
+  rule(node) {
+    this.block(node, this.rawValue(node, 'selector'))
+    if (node.raws.ownSemicolon) {
+      this.builder(node.raws.ownSemicolon, node, 'end')
+    }
+  }
+
+  stringify(node, semicolon) {
+    /* c8 ignore start */
+    if (!this[node.type]) {
+      throw new Error(
+        'Unknown AST node type ' +
+          node.type +
+          '. ' +
+          'Maybe you need to change PostCSS stringifier.'
+      )
+    }
+    /* c8 ignore stop */
+    this[node.type](node, semicolon)
+  }
+}
+
+module.exports = Stringifier
+Stringifier.default = Stringifier