patch 9.0.1038: function name does not match what it is used for

Problem:    Function name does not match what it is used for.
Solution:   Include the modifier in the name. (closes #11679)

Author: zeertzjq

src/ex_getln.c

@@ -798,12 +798,13 @@ cmdline_init(void)
 }
 
 /*
- * Handle the backslash key pressed in the command-line mode.  CTRL-\ CTRL-N
- * goes to Normal mode, CTRL-\ CTRL-G goes to Insert mode when 'insertmode' is
- * set, CTRL-\ e prompts for an expression.
+ * Handle CTRL-\ pressed in Command-line mode:
+ * - CTRL-\ CTRL-N goes to Normal mode
+ * - CTRL-\ CTRL-G goes to Insert mode when 'insertmode' is set
+ * - CTRL-\ e prompts for an expression.
  */
     static int
-cmdline_handle_backslash_key(int c, int *gotesc)
+cmdline_handle_ctrl_bsl(int c, int *gotesc)
 {
     ++no_mapping;
     ++allow_keys;
@@ -832,8 +833,7 @@ cmdline_handle_backslash_key(int c, int *gotesc)
 
 	/*
 	 * Replace the command line with the result of an expression.
-	 * Need to save and restore the current command line, to be
-	 * able to enter a new one...
+	 * This will call getcmdline() recursively in get_expr_register().
 	 */
 	if (ccline.cmdpos == ccline.cmdlen)
 	    new_cmdpos = 99999;	// keep it at the end
@@ -843,9 +843,8 @@ cmdline_handle_backslash_key(int c, int *gotesc)
 	c = get_expr_register();
 	if (c == '=')
 	{
-	    // Need to save and restore ccline.  And set "textlock"
-	    // to avoid nasty things like going to another buffer when
-	    // evaluating an expression.
+	    // Evaluate the expression.  Set "textlock" to avoid nasty things
+	    // like going to another buffer.
 	    ++textlock;
 	    p = get_expr_line();
 	    --textlock;
@@ -1909,15 +1908,15 @@ getcmdline_int(
 	// mode when 'insertmode' is set, CTRL-\ e prompts for an expression.
 	if (c == Ctrl_BSL)
 	{
-	    res = cmdline_handle_backslash_key(c, &gotesc);
+	    res = cmdline_handle_ctrl_bsl(c, &gotesc);
 	    if (res == CMDLINE_CHANGED)
 		goto cmdline_changed;
 	    else if (res == CMDLINE_NOT_CHANGED)
 		goto cmdline_not_changed;
 	    else if (res == GOTO_NORMAL_MODE)
 		goto returncmd;		// back to cmd mode
 	    c = Ctrl_BSL;		// backslash key not processed by
-					// cmdline_handle_backslash_key()
+					// cmdline_handle_ctrl_bsl()
 	}
 
 	if (c == cedit_key || c == K_CMDWIN)

src/version.c

@@ -695,6 +695,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1038,
 /**/
     1037,
 /**/