Update prompts (coderabbitai#408)

<!-- This is an auto-generated comment: release notes by OSS CodeRabbit
-->
### Summary by CodeRabbit

**New Feature:**
- Introduced a `Mobile` struct in `mobile.go` to simulate the behavior
of a mobile device with methods for turning on/off, usage, and charging.
- Enhanced code snippets and instructions for providing replacement code
suggestions in `src/prompts.ts`.
- Improved parsing functionality in `src/review.ts` to handle context
lines and skip annotations for the first 3 and last 3 lines.
- Added a new section in the PR description promoting the Pro version of
the project.

> 🎉 Code's evolving, growing so fine, 🌱
> 
> With every pull request, it shines. ✨
> 
> Mobile simulation, parsing delight, 📱🎁
> 
> Our codebase takes an exciting flight! 🚀
<!-- end of auto-generated comment: release notes by OSS CodeRabbit -->

src/prompts.ts

@@ -173,10 +173,9 @@ format \`<line_number><colon><whitespace>\`.
   line number range must map exactly to the range (inclusive) that needs to 
   be replaced within a new hunk. For instance, if 2 lines of code in a hunk 
   need to be replaced with 15 lines of code, the line number range must be 
-  those exact 2 lines. If an entire hunk need to be replaced with new code, 
-  then the line number range must be the entire hunk and the new code must
-  exactly replace ALL the lines in the hunk. Replacement suggestions should be 
-  complete, correctly formatted and without the line number annotations. 
+  those exact 2 lines. You must replace all the lines in the range with your 
+  suggestion. Replacement suggestions must be complete, correctly 
+  formatted/indented and without the line number annotations. 
 - If there are no issues found on a line range, you MUST respond with the 
   text \`LGTM!\` for that line range in the review section. 
 - Reflect on your comments and line number ranges before sending the final 
@@ -207,18 +206,18 @@ format \`<line_number><colon><whitespace>\`.
 
   ---new_hunk---
   \`\`\`
-  12:     z = x / y
-  13:     return z
-  14: 
+      z = x / y
+      return z
+
   15: def add(x, y):
   16:     z = x - y
   17:     retrn z
   18:
   19: def multiply(x, y):
   20:     return x * y
-  21: 
-  22: def subtract(x, y):
-  23:     z = x - y
+
+  def subtract(x, y):
+      z = x - y
   \`\`\`
   
   ---old_hunk---

src/review.ts

@@ -478,6 +478,10 @@ ${SHORT_SUMMARY_END_TAG}
 ### Ignoring further reviews
 - Type \`@coderabbitai: ignore\` anywhere in the PR description to ignore further reviews from the bot.
 
+### Support us :)
+
+If you like this project, please support us by purchasing the [Pro version](https://coderabbit.ai)! The Pro version has advanced context and several proprietary improvements compared to the open source version.
+
 </details>
 `
 
@@ -810,7 +814,6 @@ const parsePatch = (
   const oldHunkLines: string[] = []
   const newHunkLines: string[] = []
 
-  // let old_line = hunkInfo.old_hunk.start_line
   let newLine = hunkInfo.newHunk.startLine
 
   const lines = patch.split('\n').slice(1) // Skip the @@ line
@@ -820,17 +823,32 @@ const parsePatch = (
     lines.pop()
   }
 
+  // Skip annotations for the first 3 and last 3 lines
+  const skipStart = 3
+  const skipEnd = 3
+
+  let currentLine = 0
+
+  const removalOnly = !lines.some(line => line.startsWith('+'))
+
   for (const line of lines) {
+    currentLine++
     if (line.startsWith('-')) {
       oldHunkLines.push(`${line.substring(1)}`)
-      // old_line++
     } else if (line.startsWith('+')) {
       newHunkLines.push(`${newLine}: ${line.substring(1)}`)
       newLine++
     } else {
+      // context line
       oldHunkLines.push(`${line}`)
-      newHunkLines.push(`${newLine}: ${line}`)
-      // old_line++
+      if (
+        removalOnly ||
+        (currentLine > skipStart && currentLine <= lines.length - skipEnd)
+      ) {
+        newHunkLines.push(`${newLine}: ${line}`)
+      } else {
+        newHunkLines.push(`${line}`)
+      }
       newLine++
     }
   }