Make RE PCRE compatible. Fixes #539

Author: kislyuk

argcomplete/bash_completion.d/_python-argcomplete

@@ -216,7 +216,7 @@ _python_argcomplete_global() {
             if is-at-least 5.8; then
                 nosort=(-o nosort)
             fi
-            if [[ "${completions-}" =~ ([^\\]): && "${BASH_REMATCH[2]}" =~ [=/:] ]]; then
+            if [[ "${completions-}" =~ ([^\\\\]): && "${BASH_REMATCH[2]}" =~ [=/:] ]]; then
                 nospace=(-S '')
             fi
             _describe "$executable" completions "${nosort[@]}" "${nospace[@]}"

argcomplete/shell_integration.py

@@ -47,7 +47,7 @@
         if is-at-least 5.8; then
             nosort=(-o nosort)
         fi
-        if [[ "${completions-}" =~ ([^\\]): && "${match[1]}" =~ [=/:] ]]; then
+        if [[ "${completions-}" =~ ([^\\\\]): && "${match[1]}" =~ [=/:] ]]; then
             nospace=(-S '')
         fi
         _describe "${words[1]}" completions "${nosort[@]}" "${nospace[@]}"