3 files changed, 32 insertions, 32 deletions
diff --git a/modules/cpp/commands.lua b/modules/cpp/commands.lua
index f01561c4..263b6819 100644
--- a/modules/cpp/commands.lua
+++ b/modules/cpp/commands.lua
@@ -6,22 +6,24 @@ local textadept = _G.textadept
 -- Commands for the cpp module.
 module('_m.cpp.commands', package.seeall)
 
-local run = _m.textadept.run
-if run then
-  run.compile_command.c = 'gcc -pedantic -Os -o "%(filename_noext)" %(filename)'
-  run.compile_command.cpp = 'g++ -pedantic -Os -o "%(filename_noext)" %(filename)'
-  run.run_command.c = '%(filedir)%(filename_noext)'
-  run.run_command.cpp = '%(filedir)%(filename_noext)'
-  run.error_detail.c = {
-    pattern = '^(.-):(%d+): (.+)$',
-    filename = 1, line = 2, message = 3
-  }
-end
+local m_editing, m_run = _m.textadept.editing, _m.textadept.run
+-- Comment string tables use lexer names.
+m_editing.comment_string.cpp = '//'
+-- Compile and Run command tables use file extensions.
+m_run.compile_command.c =
+  'gcc -pedantic -Os -o "%(filename_noext)" %(filename)'
+m_run.compile_command.cpp =
+  'g++ -pedantic -Os -o "%(filename_noext)" %(filename)'
+m_run.run_command.c = '%(filedir)%(filename_noext)'
+m_run.run_command.cpp = '%(filedir)%(filename_noext)'
+m_run.error_detail.c = {
+  pattern = '^(.-):(%d+): (.+)$',
+  filename = 1, line = 2, message = 3
+}
 
 -- C++-specific key commands.
 local keys = _G.keys
 if type(keys) == 'table' then
-  local m_editing = _m.textadept.editing
   keys.cpp = {
     al = {
       m = { textadept.io.open,
diff --git a/modules/lua/commands.lua b/modules/lua/commands.lua
index b55e2f76..ac68ab84 100644
--- a/modules/lua/commands.lua
+++ b/modules/lua/commands.lua
@@ -6,14 +6,15 @@ local textadept = _G.textadept
 -- Commands for the lua module.
 module('_m.lua.commands', package.seeall)
 
-local run = _m.textadept.run
-if run then
-  run.run_command.lua = 'lua %(filename)'
-  run.error_detail.lua = {
-    pattern = '^lua: (.-):(%d+): (.+)$',
-    filename = 1, line = 2, message = 3
-  }
-end
+local m_editing, m_run = _m.textadept.editing, _m.textadept.run
+-- Comment string tables use lexer names.
+m_editing.comment_string.lua = '--'
+-- Compile and Run command tables use file extensions.
+m_run.run_command.lua = 'lua %(filename)'
+m_run.error_detail.lua = {
+  pattern = '^lua: (.-):(%d+): (.+)$',
+  filename = 1, line = 2, message = 3
+}
 
 ---
 -- Patterns for auto 'end' completion for control structures.
@@ -77,7 +78,6 @@ end
 -- Lua-specific key commands.
 local keys = _G.keys
 if type(keys) == 'table' then
-  local m_editing = _m.textadept.editing
   keys.lua = {
     al = {
       m = { textadept.io.open,
diff --git a/modules/textadept/editing.lua b/modules/textadept/editing.lua
index cc9dcc25..a27a565b 100644
--- a/modules/textadept/editing.lua
+++ b/modules/textadept/editing.lua
@@ -26,6 +26,14 @@ HIGHLIGHT_BRACES = true
 AUTOINDENT = true
 -- end settings
 
+-- Comment strings for various lexer languages.
+-- Used for the block_comment function.
+-- This table is typically populated by language-specific modules.
+-- @class table
+-- @name comment_string
+-- @see block_comment
+comment_string = {}
+
 -- Character matching.
 -- Used for auto-matching parentheses, brackets, braces, and quotes.
 local char_matches = {
@@ -58,16 +66,6 @@ local enclosure = {
   single_tag = { left = '<', right = ' />' }
 }
 
--- Comment strings for various lexer languages.
--- Used for the block_comment function.
--- @see block_comment
-local comment_strings = {
-  cpp = '//~',
-  lua = '--~',
-  python = '#~',
-  ruby = '#~',
-}
-
 textadept.events.add_handler('char_added',
   function(c) -- matches characters specified in char_matches
     if AUTOPAIR and char_matches[c] and buffer.selections == 1 then
@@ -189,7 +187,7 @@ end
 function block_comment(comment)
   local buffer = buffer
   if not comment then
-    comment = comment_strings[buffer:get_lexer_language()]
+    comment = comment_string[buffer:get_lexer_language()]
     if not comment then return end
   end
   local caret, anchor = buffer.current_pos, buffer.anchor