Fix rcore_desktop_rgfw.c line terminators

[M374LX]

The file rcore_desktop_rgfw.c uses CR+LF line terminators, but other files use just LF.

This PR fixes this inconsistency and also removes some trailing spaces.

[raysan5]

I work on Windows so, technically all raylib src code files are CR + LF.

[M374LX]

All source files except rcore_desktop_rgfw.c actually use LF line terminators, as shown by the file utility:

~/raylib/src$ file raylib.h config.h *.c
raylib.h:    C source, Unicode text, UTF-8 text
config.h:    C source, ASCII text
raudio.c:    C source, ASCII text
rcore.c:     C source, ASCII text
rglfw.c:     C source, ASCII text
rmodels.c:   C source, ASCII text
rshapes.c:   C source, ASCII text
rtext.c:     C source, ASCII text
rtextures.c: C source, ASCII text
utils.c:     C source, ASCII text
~/raylib/src$ file platforms/*.c
platforms/rcore_android.c:      C source, ASCII text
platforms/rcore_desktop_glfw.c: C source, ASCII text
platforms/rcore_desktop_rgfw.c: C source, ASCII text, with CRLF line terminators
platforms/rcore_desktop_sdl.c:  C source, ASCII text, with very long lines (315)
platforms/rcore_drm.c:          C source, ASCII text
platforms/rcore_template.c:     C source, ASCII text
platforms/rcore_web.c:          C source, ASCII text
~/contrib/raylib/src$

Most modern text editors and IDEs for Windows, including Notepad from Windows 10 onwards, support LF line terminators. So, working on Windows does not mean necessarily using CR+LF.

[M374LX]

@raysan5 Did you notice that? Do you agree that all source files should use LF line terminators?

[raysan5]

@M374LX When I open raylib source files on Windows with Notepad++, they are CR+LF. I think GitHub could be changing it when uploaded to the server... not sure...