docs: fix non-escaped URLs

Signed-off-by: Andrea Luzzardi <aluzzardi@gmail.com>

stdlib/dagger/op/op.cue

@@ -3,11 +3,9 @@ package op
 
 // One operation in a pipeline
 //
-// #Op does not current enforce the op spec at full resolution, to avoid
-// triggering performance issues. See
-// https://github.com/dagger/dagger/issues/445
-//
-// To enforce the full #Op spec (see op_fullop.cue), run with "-t fullop"
+// FIXME: #Op does not current enforce the op spec at full resolution, to avoid
+// FIXME: triggering performance issues. See https://github.com/dagger/dagger/issues/445
+// FIXME: To enforce the full #Op spec (see op_fullop.cue), run with "-t fullop"
 #Op: {
 	do: string
 	...

stdlib/git/git.cue

@@ -10,7 +10,7 @@ import (
 #Repository: {
 
 	// Git remote.
-	// Example: "https://github.com/dagger/dagger"
+	// Example: `"https://github.com/dagger/dagger"`
 	remote: string @dagger(input)
 
 	// Git ref: can be a commit, tag or branch.

stdlib/js/yarn/yarn.cue

@@ -1,5 +1,4 @@
 // Yarn is a package manager for Javascript applications
-// https://yarnpkg.com
 package yarn
 
 import (