ex-2: fix table alignment

notes/sections/2.md

@@ -6,7 +6,8 @@
 The Euler-Mascheroni constant is defined as the limiting difference between the
 partial sums of the harmonic series and the natural logarithm:
 $$
-  \gamma = \lim_{n \rightarrow +\infty} \left( \sum_{k=1}^{n} \frac{1}{k}
+  \gamma = \lim_{n \rightarrow +\infty} \left(
+    \sum_{k=1}^{n} \frac{1}{k}
   - \ln(n) \right)
 $$ {#eq:gamma}
 
@@ -150,7 +151,7 @@ terms of floating points). Different values of $z$ were checked, with $z_{i+1}
 = z_i + 0.01$ ranging from 0 to 20, and the best result was found for $z = 9$.
 
 -----------------------------------------------
-z      $|γ(z) - γ|$    z       $|γ(z) - γ|$
+z     $|γ(z) - γ|$     z       $|γ(z) - γ|$
 ----- ---------------- ------  ----------------
  1     \num{9.712e-9}   8.95    \num{9.770e-9}
  
@@ -170,7 +171,7 @@ z      $|γ(z) - γ|$    z       $|γ(z) - γ|$
  
  17    \num{9.971e-9}   9.03    \num{9.264e-9}
  
- 19    \num{10.084e-9}  9.04    \num{9.419e-9}
+ 19    \num{1.008e-8}   9.04    \num{9.419e-9}
 -----------------------------------------------
 
 Table: Differences between some obtained values of $\gamma$ and