Added various subcrates to workspace and solved code smell

Cargo.toml

@@ -13,4 +13,11 @@ authors = ["Marco Visani"]
 [dependencies]
 minify_sql = { path = "minify_sql" }
 load_sql_proc = { path = "load_sql_proc" }
-minify_sql_proc = { path = "minify_sql_proc" }
+minify_sql_proc = { path = "minify_sql_proc" }
+
+[workspace]
+members = [
+    "minify_sql",
+    "load_sql_proc",
+    "minify_sql_proc"
+]

minify_sql/src/lib.rs

@@ -37,7 +37,7 @@ pub fn minify_sql(document: &str) -> String {
     // We need to this first, as the multiline comments can span multiple lines
     // and if we remove the line breaks first, we might accidentally add new
     // combinations of characters that seem to be an open or close comment.
-    let document_without_multiline_comments = remove_multiline_comments(&document);
+    let document_without_multiline_comments = remove_multiline_comments(document);
 
     // We remove in all lines of the file the single line comments
     let mut document_without_comments =