[pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

Author: pre-commit-ci[bot]

test/test_source/pp/preproc_elif.F90

@@ -1,6 +1,6 @@
 subroutine preprocessor_elif(var, var3, var4, var5, var6)
 
-! This file, as used in test_preproc, checks that 
+! This file, as used in test_preproc, checks that
 ! 1. the steps after the preprocessor parsing has fully finished, are only
 ! using content from the parts within the preprocessor if-elif-else that
 ! should be used. To do this, it has some regular fortran code within the

test/test_source/pp/preproc_if_elif_else.F90

@@ -4,7 +4,7 @@ subroutine preprocessor_if_elif_else()
 ! tests that when there is an if-elif-elif-else, only the first branch that
 ! evaluates to true is used, and the others ignored. Also when multiple
 ! conditions evaluate to true.
-    
+
 #if 0
 #define PART1 0
 #elif 0

test/test_source/pp/preproc_if_elif_skip.F90

@@ -4,7 +4,7 @@ subroutine preprocessor_if_elif_skip()
 ! tests that when there is an if-elif-elif-else, only the first branch that
 ! evaluates to true is used, and the others ignored. Also when multiple
 ! conditions evaluate to true.
-    
+
 #if 1
 #define PART1 1
 #elif 0