docs: use singular form for one optional parameter

Signed-off-by: Sebastian Davids <[email protected]>

Author: sdavids

docs/user-guide/modules/ROOT/pages/scripts/docker/docker-ignore-all.adoc

@@ -5,7 +5,7 @@
 
 {script_url}[This script^] will create a `.dockerignore` file ignoring everything for a given directory (`$PWD` if not given).
 
-The following parameters are optional:
+The following parameter is optional:
 
 `f` :: overwrite an existing `.dockerignore` file
 

docs/user-guide/modules/ROOT/pages/scripts/general/shellscript-format-check.adoc

@@ -7,7 +7,7 @@
 
 This script's exit code is `0` if all shell script files adhere to Google Shell Style or `1` if not.
 
-The following parameters are optional:
+The following parameter is optional:
 
 `v` :: display the paths of the files whose formatting does not adhere to Google Shell Style
 

docs/user-guide/modules/ROOT/pages/scripts/git/git-ignore-all.adoc

@@ -5,7 +5,7 @@
 
 {script_url}[This script^] will create a `.gitignore` file ignoring everything for a given Git directory (`$PWD` if not given).
 
-The following parameters are optional:
+The following parameter is optional:
 
 `f` :: overwrite an existing `.gitignore` file
 

docs/user-guide/modules/ROOT/pages/scripts/java/java-format-check.adoc

@@ -7,7 +7,7 @@
 
 This script's exit code is `0` if all `*.java` files adhere to Google Java Style or `1` if not.
 
-The following parameters are optional:
+The following parameter is optional:
 
 `v` :: display the paths of the files whose formatting does not adhere to Google Java Style