fix: fixes casing of version strings

Addresses an edge case where the `convert_case` crate incorrectly transforms version strings like "v_1" into "V_1".

This change introduces a regular expression to correct these patterns, ensuring that version strings are properly cased as "v1".

Author: aorumbayev

src/render.rs

@@ -1,13 +1,19 @@
 use color_eyre::eyre::{eyre, Context, ContextCompat, Result};
 use convert_case::{Case, Casing};
+use regex::Regex;
 use std::path::Path;
+use std::sync::LazyLock;
 
 use crate::parsing::{find_suite, find_test, get_group_comment, get_groups, get_suite_chunk};
 use crate::runner::Runner;
 use crate::target::Target;
 use crate::ConfigMeta;
 use crate::{document::Document, group::Group, suite::Suite, test::Test};
 
+// Regex to fix version patterns like v_1, v_2, v_3 back to v1, v2, v3
+// This is needed because convert_case treats letter-to-number transitions as word boundaries
+static VERSION_PATTERN: LazyLock<Regex> = LazyLock::new(|| Regex::new(r"v_(\d+)").unwrap());
+
 fn case_from_str(s: &str) -> Result<Case> {
     match s {
         "Alternating" => Ok(Case::Alternating),
@@ -36,9 +42,12 @@ fn case_from_str(s: &str) -> Result<Case> {
 }
 
 fn convert_case_filter(input: &str, case: &str) -> String {
-    input.to_case(case_from_str(case).unwrap_or_else(|e| {
+    let result = input.to_case(case_from_str(case).unwrap_or_else(|e| {
         panic!("failed to convert case: {}", e);
-    }))
+    }));
+    // Fix common version patterns like v_1, v_2, v_3 back to v1, v2, v3
+    // The convert_case crate treats letter-to-number transitions as word boundaries
+    VERSION_PATTERN.replace_all(&result, "v$1").to_string()
 }
 
 pub fn insert_after_keyword(original: &str, to_insert: &str, keyword: &str) -> String {