code-style: fix consistency issues all over the codebase (#94)

* remove duplicate comment
* remove empty tabs and blank lines
* move macros and globals ontop
* comment to seprate function implementation
* fix alignment
* switch to *argv[] similar to other suckless code
* kill all empty last lines
* append comment to endif
* reuse existing ARRLEN macro
* comment fall through
* use while (true) everywhere

Co-authored-by: NRK <nrk@disroot.org>

util.c

@@ -30,7 +30,7 @@ const char *progname;
 void* emalloc(size_t size)
 {
 	void *ptr;
-	
+
 	ptr = malloc(size);
 	if (ptr == NULL)
 		error(EXIT_FAILURE, errno, NULL);
@@ -172,7 +172,7 @@ char* r_readdir(r_dir_t *rdir, bool skip_dotfiles)
 			}
 			return filename;
 		}
-		
+
 		if (rdir->recursive && rdir->stlen > 0) {
 			/* open next subdirectory */
 			closedir(rdir->dir);
@@ -210,4 +210,3 @@ int r_mkdir(char *path)
 	}
 	return 0;
 }
-