Add support for parsing column numbers in Visual Studio messages

* lisp/progmodes/compile.el (compilation-error-regexp-alist-alist):
Extend regular expression to match optional column numbers.
*
test/lisp/progmodes/compile-tests.el (compile-tests--test-regexps-data):
Add a test.
* test/lisp/progmodes/compile-tests.el (compile-test-error-regexps):
Update the total number of compilation errors in a test.
* etc/compilation.txt: Update compilation.txt with the newly supported
message format.
* etc/NEWS: Advertise the feature.

etc/NEWS

@@ -557,6 +557,9 @@ case-insensitive matching of messages when the old behavior is
 required, but the recommended solution is to use a correctly matching
 regexp instead.
 
+---
+*** Messages from Visual Studio that mention column numbers are now recognized.
+
 ** Hi Lock mode
 
 ---

etc/compilation.txt

@@ -381,6 +381,7 @@ made it more strict about the error message that follows.
 keyboard handler.c(537) : warning C4005: 'min' : macro redefinition
 d:\tmp\test.c(23) : error C2143: syntax error : missing ';' before 'if'
 d:\tmp\test.c(1145) : see declaration of 'nsRefPtr'
+c:\tmp\test.cpp(101,11): error C4101: 'bias0123': unreferenced local variable [c:\tmp\project.vcxproj]
 1>test_main.cpp(29): error C2144: syntax error : 'int' should be preceded by ';'
 1>test_main.cpp(29): error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
 1>

lisp/progmodes/compile.el

@@ -221,9 +221,9 @@ of[ \t]+\"?\\([a-zA-Z]?:?[^\":\n]+\\)\"?:" 3 2 nil (1))
      ;; considered before EDG.
      ;; The message may be a "warning", "error", or "fatal error" with
      ;; an error code, or "see declaration of" without an error code.
-     "^ *\\([0-9]+>\\)?\\(\\(?:[a-zA-Z]:\\)?[^ :(\t\n][^:(\t\n]*\\)(\\([0-9]+\\)) ?\
+     "^ *\\([0-9]+>\\)?\\(\\(?:[a-zA-Z]:\\)?[^ :(\t\n][^:(\t\n]*\\)(\\([0-9]+\\)\\(?:,\\([0-9]+\\)\\)?) ?\
 : \\(?:see declaration\\|\\(?:warnin\\(g\\)\\|[a-z ]+\\) C[0-9]+:\\)"
-     2 3 nil (4))
+     2 3 4 (5))
 
     (edg-1
      "^\\([^ \n]+\\)(\\([0-9]+\\)): \\(?:error\\|warnin\\(g\\)\\|remar\\(k\\)\\)"

test/lisp/progmodes/compile-tests.el

@@ -267,6 +267,8 @@
      3 nil 29 "test_main.cpp")
     ("1>test_main.cpp(29): error C4430: missing type specifier - int assumed. Note: C++ does not support default-int"
      3 nil 29 "test_main.cpp")
+    ("C:\\tmp\\test.cpp(101,11): error C4101: 'bias0123': unreferenced local variable [C:\\tmp\\project.vcxproj]"
+     1 11 101 "C:\\tmp\\test.cpp")
     ;; watcom
     ("..\\src\\ctrl\\lister.c(109): Error! E1009: Expecting ';' but found '{'"
      1 nil 109 "..\\src\\ctrl\\lister.c")
@@ -434,7 +436,7 @@ The test data is in `compile-tests--test-regexps-data'."
           (compilation-num-warnings-found 0)
           (compilation-num-infos-found 0))
       (mapc #'compile--test-error-line compile-tests--test-regexps-data)
-      (should (eq compilation-num-errors-found 94))
+      (should (eq compilation-num-errors-found 95))
       (should (eq compilation-num-warnings-found 35))
       (should (eq compilation-num-infos-found 28)))))