feat: update error notes for wfassoc

wfassoc-cdylib/src/lib.rs

@@ -14,17 +14,17 @@ use wfassoc::highlevel::{Program, Schema};
 #[derive(Debug, TeError)]
 enum Error {
     /// Error when operating Schema.
-    #[error("{0}")]
+    #[error("wfassoc error: {0}")]
     Schema(#[from] wfassoc::highlevel::SchemaError),
     /// Error when parsing Schema into Program.
-    #[error("{0}")]
+    #[error("wfassoc error: {0}")]
     ParseProgram(#[from] wfassoc::highlevel::ParseProgramError),
     /// Error when operating Program.
-    #[error("{0}")]
+    #[error("wfassoc error: {0}")]
     Program(#[from] wfassoc::highlevel::ProgramError),
 
     /// Error when manipulating with C-style string.
-    #[error("C-Style string FFI error:{0}")]
+    #[error("C-Style string FFI error: {0}")]
     CStrFfi(#[from] cstr_ffi::Error),
     /// Error when manipulating with object pool.
     #[error("object pool error: {0}")]