pages.nl/common/*: add Dutch translation (#11582)

pages/common/fgrep.md

@@ -10,7 +10,7 @@
 
 - Search only lines that match entirely in files:
 
-`fgrep -x {{path/to/file1}} {{path/to/file2}}`
+`fgrep -x {{search_string}} {{path/to/file1}} {{path/to/file2}}`
 
 - Count the number of lines that match the given string in a file:
 

pages/common/vimdiff.md

@@ -6,7 +6,7 @@
 
 - Open two files and show the differences:
 
-`vimdiff {{file1}} {{file2}}`
+`vimdiff {{path/to/file1}} {{path/to/file2}}`
 
 - Move the cursor to the window on the left|right: