diff --git a/dvc/command/checkout.py b/dvc/command/checkout.py
index cf3560f39..5d1941587 100644
--- a/dvc/command/checkout.py
+++ b/dvc/command/checkout.py
@@ -54,7 +54,7 @@ def add_parser(subparsers, parent_parser):
     checkout_parser.add_argument(
         "targets",
         nargs="*",
-        help="DVC-files to checkout. Optional."
+        help="DVC-files to checkout. Optional. "
         "(Finds all DVC-files in the workspace by default.)",
     )
     checkout_parser.set_defaults(func=CmdCheckout)
diff --git a/dvc/command/commit.py b/dvc/command/commit.py
index 731b44bac..daa4d2474 100644
--- a/dvc/command/commit.py
+++ b/dvc/command/commit.py
@@ -67,7 +67,7 @@ def add_parser(subparsers, parent_parser):
     commit_parser.add_argument(
         "targets",
         nargs="*",
-        help="DVC-files to commit. Optional."
+        help="DVC-files to commit. Optional. "
         "(Finds all DVC-files in the workspace by default.)",
     )
     commit_parser.set_defaults(func=CmdCommit)
diff --git a/dvc/command/pipeline.py b/dvc/command/pipeline.py
index d578b2493..8b7bc2f40 100644
--- a/dvc/command/pipeline.py
+++ b/dvc/command/pipeline.py
@@ -248,7 +248,7 @@ def add_parser(subparsers, parent_parser):
     pipeline_show_parser.add_argument(
         "targets",
         nargs="*",
-        help="DVC-files to show pipeline for. Optional."
+        help="DVC-files to show pipeline for. Optional. "
         "(Finds all DVC-files in the workspace by default.)",
     )
     pipeline_show_parser.set_defaults(func=CmdPipelineShow)
diff --git a/dvc/command/remove.py b/dvc/command/remove.py
index 130efadbf..b8e98200c 100644
--- a/dvc/command/remove.py
+++ b/dvc/command/remove.py
@@ -76,7 +76,7 @@ def add_parser(subparsers, parent_parser):
     remove_parser.add_argument(
         "targets",
         nargs="+",
-        help="DVC-files to remove. Optional."
+        help="DVC-files to remove. Optional. "
         "(Finds all DVC-files in the workspace by default.)",
     )
     remove_parser.set_defaults(func=CmdRemove)