[librsvg/improve-msvc-docs: 2/2] win32/info-msvc.mak: Update build info

[Chun-wei Fan <fanchunwei src gnome org>]

commit 9e85c6986c6ec00c0b04df150e280dc71fdd3b04
Author: Chun-wei Fan <fanchunwei src gnome org>
Date:   Thu Feb 17 16:45:47 2022 +0800

    win32/info-msvc.mak: Update build info
    
    Fix an incorrect mention of the PKG_CONFIG_PATH flag, and replace it with
    appropriate info.  Also make it known, again, that any paths passed in with the
    invocation of this NMake Makefile set should be enclosed with quotes if there
    are spaces in them.

 win32/info-msvc.mak | 14 +++++++++-----
 1 file changed, 9 insertions(+), 5 deletions(-)
---
diff --git a/win32/info-msvc.mak b/win32/info-msvc.mak
index 631b3d9f9..e306614f2 100644
--- a/win32/info-msvc.mak
+++ b/win32/info-msvc.mak
@@ -31,8 +31,8 @@ help:
        @echo ============================
        @echo nmake /f Makefile.vc CFG=[release^|debug] ^<PREFIX=PATH^> ... OPTION=1 ...
        @echo.
-       @echo Where:
-       @echo ------
+       @echo Where (please note that paths with spaces should be enclosed with quotes):
+       @echo --------------------------------------------------------------------------
        @echo CFG: Required, use CFG=release for an optimized build and CFG=debug
        @echo for a debug build.  PDB files are generated for all builds.
        @echo.
@@ -56,9 +56,13 @@ help:
        @echo will be searched for in ^$(INCLUDEDIR)\glib-2.0 and
        @echo ^$(LIBDIR)\glib-2.0\include.
        @echo.
-       @echo PKG_CONFIG_PATH: Full path to pkg-config.exe.  Required if building
-       @echo introspection files and if pkg-config.exe is not in your PATH or it
-       @echo is called something other than pkg-config.
+       @echo PKG_CONFIG: Full path to pkg-config.exe or a compatible tool.  Required
+       @echo if building introspection files and if pkg-config.exe is not in your PATH
+       @echo or it is called something other than pkg-config.
+       @echo.
+       @echo PKG_CONFIG_PATH: Used by the pkg-config tool.  Needed if pkg-config/.pc files
+       @echo for GLib and Pango (and so forth) are not in the default search paths of the
+       @echo pkg-config (or compatible) tool, so that the needed .pc files can be found.
        @echo.
        @echo PYTHON: Full path to your Python interpreter executable.  Required
        @echo if building introspection files and if python.exe is not in your PATH.