more code formatting consistency changes for loops and conditionals

src/write_coeff.cpp

@@ -97,7 +97,7 @@ void WriteCoeff::command(int narg, char **arg)
     fprintf(two,"# LAMMPS coeff file via write_coeff, version %s\n",
             lmp->version);
 
-    while(1) {
+    while (1) {
       int coeff_mode = REGULAR_MODE;
       if (fgets(str,256,one) == nullptr) break;