[pre-commit.ci] Fixing issues with pre-commit

Author: pre-commit-ci[bot]

docs/tutorials/multi_r_compilation.md

@@ -80,13 +80,12 @@ Enter the number corresponding to the selected version:
     is restarted. Whenever following instructions that use these variables to
     refer to the build and source directory, be sure they are pointing to the
     desired version!
-    
+
     You can check the values any time with:
 
         ```bash
         echo $BUILDDIR
         echo $TOP_SRCDIR
         ```
-    
-    and switch with `set_build_r <name>`.
 
+    and switch with `set_build_r <name>`.