Correct typos in docs/ and man/

Signed-off-by: Casey Korver <casey@korver.dev>

docs/reference/commandline/volume_create.md

@@ -57,7 +57,7 @@ A volume named  "hello"  already exists with the "some-other" driver. Choose a d
 ```
 
 If you specify a volume name already in use on the current driver, Docker
-assumes you want to re-use the existing volume and doesn't return an error.
+assumes you want to reuse the existing volume and doesn't return an error.
 
 ### <a name="opt"></a> Driver-specific options (-o, --opt)
 

man/Dockerfile.5.md

@@ -48,7 +48,7 @@ A Dockerfile is similar to a Makefile.
   to a new image if necessary, before finally outputting the ID of the new
   image. The Docker daemon automatically cleans up the context it is given.
 
-  Docker re-uses intermediate images whenever possible. This significantly
+  Docker reuses intermediate images whenever possible. This significantly
   accelerates the *docker build* process.
 
 # FORMAT