Fix for bug reported by @Dragonsong3k in microsoft/vscode#7522

Author: gravejester

PowerShellSyntax.tmLanguage

@@ -1423,7 +1423,7 @@
 					<key>comment</key>
 					<string>Automatic variables - read-only.</string>
 					<key>match</key>
-					<string>(\$)(?i:(_|args|consolefilename|error|event|eventsubscriber|executioncontext|false|foreach|home|host|input|lastexitcode|matches|myinvocation|nestedpromptlevel|null|pid|psboundparameters|pscmdlet|psculture|psdebugcontext|pshome|psitem|psscriptroot|psuiculture|psversiontable|pwd|sender|shellid|sourceargs|sourceeventargs|switch|this|true))\b((\.[\w"'\- @]+)*)</string>
+					<string>(\$)(?i:(_|args|consolefilename|error|event|eventsubscriber|executioncontext|false|foreach|home|host|input|lastexitcode|matches|myinvocation|nestedpromptlevel|null|pid|psboundparameters|pscmdlet|psculture|psdebugcontext|pshome|psitem|psscriptroot|psuiculture|psversiontable|pwd|sender|shellid|sourceargs|sourceeventargs|switch|this|true))\b((\.[\w"'\- @#]+)*)</string>
 				</dict>
 				<dict>
 					<key>captures</key>
@@ -1457,7 +1457,7 @@
 					<key>comment</key>
 					<string>$var, $local:var</string>
 					<key>match</key>
-					<string>(\$)((?i:global|local|script|private|using|env|function|alias|cert|variable|hkcu|hklm|wsman):)?(\w+)(:\w+)?((\.[\w"'\- @]+)*)</string>
+					<string>(\$)((?i:global|local|script|private|using|env|function|alias|cert|variable|hkcu|hklm|wsman):)?(\w+)(:\w+)?((\.[\w"'\- @#]+)*)</string>
 				</dict>
 				<dict>
 					<key>captures</key>
@@ -1496,7 +1496,7 @@
 					<key>comment</key>
 					<string>${var}, ${script:var}</string>
 					<key>match</key>
-					<string>(\$)(\{)((?i:global|local|script|private|using|env|function|alias|cert|variable|hkcu|hklm|wsman):)?(.+?)(\})((\.[\w"'\- @]+)*)</string>
+					<string>(\$)(\{)((?i:global|local|script|private|using|env|function|alias|cert|variable|hkcu|hklm|wsman):)?(.+?)(\})((\.[\w"'\- @#]+)*)</string>
 				</dict>
 				<dict>
 					<key>captures</key>