another blocker against mku equal 0 and added tprintf

doc/source/netscript/basicfunctions/tprintf.rst

@@ -0,0 +1,17 @@
+tprint() Netscript Function
+===========================
+
+.. js:function:: tprintf(format, args...)
+
+    :RAM cost: 0 GB
+    :param format: Format of the string to be printed.
+    :param args: Values to be formatted
+
+    Prints a raw formatted string to the terminal.
+
+    Example:
+
+    .. code-block:: javascript
+
+        tprintf("Hello world!"); // Prints "Hello world!" to the terminal.
+        tprintf("Hello %s", "world!"); // Prints "Hello world!" to the terminal.

doc/source/netscript/netscriptfunctions.rst

@@ -19,6 +19,7 @@ This includes information such as function signatures, what they do, and their r
     sleep() <basicfunctions/sleep>
     print() <basicfunctions/print>
     tprint() <basicfunctions/tprint>
+    tprintf() <basicfunctions/tprint>
     clearLog() <basicfunctions/clearLog>
     disableLog() <basicfunctions/disableLog>
     enableLog() <basicfunctions/enableLog>

src/Corporation/Corporation.jsx

@@ -1112,8 +1112,13 @@ Industry.prototype.processProduct = function(marketCycles=1, product, corporatio
             } else if (product.marketTa1) {
                 sCost = product.pCost + markupLimit;
             } else if (isString(product.sCost)) {
+                if(product.mku === 0) {
+                    console.error(`mku is zero, reverting to 1 to avoid Infinity`);
+                    product.mku = 1;
+                }
                 sCost = product.sCost.replace(/MP/g, product.pCost + product.rat / product.mku);
                 sCost = eval(sCost);
+
             } else {
                 sCost = product.sCost;
             }

src/NetscriptFunctions.js

@@ -936,6 +936,9 @@ function NetscriptFunctions(workerScript) {
             }
             post(`${workerScript.scriptRef.filename}: ${argsToString(arguments)}`);
         },
+        tprintf: function(format, ...args) {
+            post(vsprintf(format, args));
+        },
         clearLog: function() {
             workerScript.scriptRef.clearLog();
         },