Bulk change: move double quotes outside tokens (#4431)

pages/common/echo.md

@@ -4,20 +4,20 @@
 
 - Print a text message. Note: quotes are optional:
 
-`echo {{"Hello World"}}`
+`echo "{{Hello World}}"`
 
 - Print a message with environment variables:
 
-`echo {{"My path is $PATH"}}`
+`echo "{{My path is $PATH}}"`
 
 - Print a message without the trailing newline:
 
-`echo -n {{"Hello World"}}`
+`echo -n "{{Hello World}}"`
 
 - Append a message to the file:
 
-`echo {{"Hello World"}} >> {{file.txt}}`
+`echo "{{Hello World}}" >> {{file.txt}}`
 
 - Enable interpretation of backslash escapes (special characters):
 
-`echo -e {{"Column 1\tColumn 2"}}`
+`echo -e "{{Column 1\tColumn 2}}"`