Improve formatting of fatal errors

lib/codeql.js

@@ -742,8 +742,8 @@ async function runTool(cmd, args = [], opts = {}) {
     return output;
 }
 function extractFatalErrors(error) {
-    const fatalErrors = [];
     const fatalErrorRegex = /.*fatal error occurred:/gi;
+    let fatalErrors = [];
     let lastFatalErrorIndex;
     let match;
     while ((match = fatalErrorRegex.exec(error)) !== null) {
@@ -758,11 +758,21 @@ function extractFatalErrors(error) {
             // No other errors
             return lastError;
         }
-        const separator = fatalErrors.some((e) => e.includes("\n")) ? "\n" : " ";
-        return [lastError, "Context:", ...fatalErrors.reverse()].join(separator);
+        const isOneLiner = !fatalErrors.some((e) => e.includes("\n"));
+        if (isOneLiner) {
+            fatalErrors = fatalErrors.map(ensureEndsInPeriod);
+        }
+        return [
+            ensureEndsInPeriod(lastError),
+            "Context:",
+            ...fatalErrors.reverse(),
+        ].join(isOneLiner ? " " : "\n");
     }
     return undefined;
 }
+function ensureEndsInPeriod(text) {
+    return text[text.length - 1] === "." ? text : `${text}.`;
+}
 /**
  * If appropriate, generates a code scanning configuration that is to be used for a scan.
  * If the configuration is not to be generated, returns undefined.