Fix error messages in core (#159)

**Stack**:
- #168
- #167
- #166
- #165
- #164
- #163
- #160
- #159 ⬅
- #158


⚠️ *Part of a stack created by [spr](https://github.com/ejoffe/spr). Do
not merge manually using the UI - doing so may have unexpected results.*

Author: ksew1

crates/cairo-coverage-core/src/build/coverage_input.rs

@@ -33,7 +33,7 @@ pub fn build(
     }: ExecutionData,
     filter: &StatementCategoryFilter,
 ) -> CoverageInput {
-    let casm_debug_info = compile(&program).expect("Failed to compile program to casm");
+    let casm_debug_info = compile(&program).expect("failed to compile program to casm");
 
     let statement_information_map =
         statement_information::build_map(coverage_annotations, profiler_annotations, filter);

crates/cairo-coverage-core/src/lib.rs

@@ -55,7 +55,7 @@ pub fn run(
         // Versioned programs and contract classes can represent the same piece of code,
         // so we merge the file coverage after processing them to avoid duplicate entries.
         .reduce(merge)
-        .context("At least one trace file must be provided")?;
+        .context("at least one trace file must be provided")?;
 
     Ok(lcov::fmt_string(&coverage_data))
 }
@@ -66,5 +66,5 @@ fn scarb_metadata() -> Result<Metadata> {
         .inherit_stderr()
         .inherit_stdout()
         .exec()
-        .context("error: could not gather project metadata from Scarb due to previous error")
+        .context("could not gather project metadata from Scarb due to previous error")
 }

crates/cairo-coverage-core/src/loading/enriched_program.rs

@@ -67,7 +67,7 @@ fn extract_versioned_program(
 ) -> Result<(Program, DebugInfo)> {
     Ok((
         program,
-        debug_info.context("Debug info not found in program")?,
+        debug_info.context("debug info not found in program")?,
     ))
 }
 
@@ -76,7 +76,7 @@ fn extract_contract_class(contract_class: ContractClass) -> Result<(Program, Deb
     let program = contract_class.extract_sierra_program()?;
     let debug_info = contract_class
         .sierra_program_debug_info
-        .context("Debug info not found in contract")?;
+        .context("debug info not found in contract")?;
     Ok((program, debug_info))
 }
 
@@ -96,7 +96,7 @@ fn deserialize_annotations<T: TryFromDebugInfo<Error = AnnotationsError>>(
 ) -> Result<T> {
     const RECOMMENDED_CAIRO_PROFILE_TOML: &str = indoc! {
         r#"
-        Perhaps you are missing the following entries in Scarb.toml:
+        perhaps you are missing the following entries in Scarb.toml:
 
         [profile.dev.cairo]
         unstable-add-statements-functions-debug-info = true

crates/cairo-coverage-core/src/loading/mod.rs

@@ -24,9 +24,9 @@ mod execution_infos;
 /// Utility function to read and deserialize a JSON file.
 fn read_and_deserialize<T: DeserializeOwned>(file_path: &Utf8PathBuf) -> Result<T> {
     let content = fs::read_to_string(file_path)
-        .context(format!("Failed to read file at path: {file_path}"))?;
+        .context(format!("failed to read file at path: {file_path}"))?;
 
     serde_json::from_str(&content).context(format!(
-        "Failed to deserialize JSON content from file at path: {file_path}"
+        "failed to deserialize JSON content from file at path: {file_path}"
     ))
 }