Rename some files (#952)

* renamed some files

* clippy

* update tests

crates/nu-command/src/strings/str_/case/mod.rs

@@ -1,16 +1,16 @@
 pub mod camel_case;
-pub mod command;
 pub mod kebab_case;
 pub mod pascal_case;
 pub mod screaming_snake_case;
 pub mod snake_case;
+pub mod str_;
 
 pub use camel_case::SubCommand as StrCamelCase;
-pub use command::Str;
 pub use kebab_case::SubCommand as StrKebabCase;
 pub use pascal_case::SubCommand as StrPascalCase;
 pub use screaming_snake_case::SubCommand as StrScreamingSnakeCase;
 pub use snake_case::SubCommand as StrSnakeCase;
+pub use str_::Str;
 
 use nu_engine::CallExt;
 

crates/nu-command/src/strings/str_/case/str_.rs

@@ -38,7 +38,7 @@ impl Command for Str {
 
 #[cfg(test)]
 mod test {
-    use super::*;
+    use crate::Str;
 
     #[test]
     fn test_examples() {

crates/nu-command/src/strings/str_/trim/mod.rs

@@ -1,2 +1,2 @@
-mod command;
-pub use command::SubCommand as Trim;
+mod trim_;
+pub use trim_::SubCommand as Trim;

crates/nu-command/src/strings/str_/trim/trim_.rs

@@ -321,7 +321,8 @@ fn trim(s: &str, char_: Option<char>, closure_flags: &ClosureFlags) -> String {
 
 #[cfg(test)]
 mod tests {
-    use super::*;
+    use crate::strings::str_::trim::trim_::*;
+    use nu_protocol::{Span, Value};
 
     #[test]
     fn test_examples() {