Try to implement full ruby string switching with quotes

Author: AndrewRadev

ftplugin/ruby/switch.vim

@@ -17,6 +17,7 @@ let b:switch_definitions =
       \   g:switch_builtins.rspec_expect,
       \   g:switch_builtins.rspec_to,
       \   g:switch_builtins.rspec_be_truthy_falsey,
+      \   g:switch_builtins.ruby_keyword_string,
       \   g:switch_builtins.ruby_string,
       \   g:switch_builtins.ruby_short_blocks,
       \   g:switch_builtins.ruby_array_shorthand,

plugin/switch.vim

@@ -52,11 +52,15 @@ let g:switch_builtins =
       \     'if false and (\(.*\))':        'if \1',
       \     'if \%(true\|false\)\@!\(.*\)': 'if true or (\1)',
       \   },
-      \   'ruby_string': {
+      \   'ruby_keyword_string': {
       \     '"\(\k\+\%([?!]\)\=\)"':                '''\1''',
       \     '''\(\k\+\%([?!]\)\=\)''':              ':\1',
       \     ':\(\k\+\%([?!]\)\=\)\@>\%(\s*=>\)\@!': '"\1"\2',
       \   },
+      \   'ruby_string': {
+      \     '"\(\%([^"\\]\|\\.\)*\)"':    '''\1''',
+      \     '''\(\%([^''\\]\|\\.\)*\)''': '"\1"',
+      \   },
       \   'ruby_short_blocks': {
       \     '\(\k\+\)(&:\(\k\+[!?]\=\))':                   '\1 { |x| x\.\2 }',
       \     '\(\k\+\)\s\={\s*|\(\k\+\)|\s*\2.\(\S\+\)\s*}': '\1(&:\3)',