Fix code formatting with ruff

Applied automatic code formatting to resolve style inconsistencies:
- Fixed string quote normalization in examples
- Simplified multi-line string formatting
- Removed unnecessary blank lines

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <[email protected]>

Author: codebydivine

examples/unified_price_api.py

@@ -212,7 +212,7 @@ def print_comprehensive_summary() -> None:
     print("   ")
     print("   # Detailed analysis with statistics")
     print("   stats = await api.price.get(Currency.SOL, include_stats=True)")
-    print("   print(f'Price: ${stats[\"price\"]:.2f}, Confidence: {stats[\"confidence\"]:.0%}')")
+    print('   print(f\'Price: ${stats["price"]:.2f}, Confidence: {stats["confidence"]:.0%}\')')
     print("   ")
     print("   # Check supported currencies")
     print("   supported = await api.price.get_supported_currencies()")

src/thegraph_token_api/unified_price_api.py

@@ -85,9 +85,7 @@ async def get(
         """
         # Validate Currency enum only - no string support
         if not isinstance(currency, Currency):
-            msg = (
-                f"Currency must be Currency enum, got {type(currency)}. Use Currency.ETH, Currency.SOL, Currency.POL, Currency.BNB, or Currency.AVAX"
-            )
+            msg = f"Currency must be Currency enum, got {type(currency)}. Use Currency.ETH, Currency.SOL, Currency.POL, Currency.BNB, or Currency.AVAX"
             raise TypeError(msg)
 
         # Check cache first (unless force refresh)
@@ -131,9 +129,7 @@ async def is_supported(self, currency: Currency) -> bool:
             True if currency is supported
         """
         if not isinstance(currency, Currency):
-            msg = (
-                f"Currency must be Currency enum, got {type(currency)}. Use Currency.ETH, Currency.SOL, Currency.POL, Currency.BNB, or Currency.AVAX"
-            )
+            msg = f"Currency must be Currency enum, got {type(currency)}. Use Currency.ETH, Currency.SOL, Currency.POL, Currency.BNB, or Currency.AVAX"
             raise TypeError(msg)
         return is_currency_supported(currency)
 
@@ -233,8 +229,6 @@ async def _fetch_evm_price(self, config: dict[str, Any], network_id: NetworkId)
         # Calculate statistics
         return self.calculator.calculate_price_statistics(prices, len(swaps))
 
-
-
     async def _fetch_solana_price(self, config: dict[str, Any]) -> dict[str, Any] | None:
         """
         Fetch SOL price using Solana DEX swaps.