fixed

Author: hauner

src/main/kotlin/io/openapiprocessor/core/writer/java/Identifier.kt

@@ -145,7 +145,7 @@ private fun splitAtWordBreaks(src: String): List<String> {
     val trimmed = src.trimInvalidStart()
     trimmed.forEachIndexed { idx, c ->
 
-        if (idx == 0 || !src.isWordBreak(idx)) {
+        if (idx == 0 || !trimmed.isWordBreak(idx)) {
             current.append(c)
             return@forEachIndexed
         }

src/test/groovy/io/openapiprocessor/core/writer/java/IdentifierSpec.groovy

@@ -48,6 +48,7 @@ class IdentifierSpec extends Specification {
         "a-foo-bar"      | "aFooBar"      | "AFooBar"      | "A_FOO_BAR"
         "a foo-bar"      | "aFooBar"      | "AFooBar"      | "A_FOO_BAR"
         'api/some/thing' | 'apiSomeThing' | "ApiSomeThing" | "API_SOME_THING"
+        "_fo-o"          | 'foO'          | 'FoO'          | "FO_O"
 
         // word break at underscore, it is valid but unwanted except for enums
         "_ab"            | "ab"           | "Ab"           | "AB"