Merge pull request #129 from atcoder/patch/128

fix documents of maxflow

Author: yosupo06

document_en/maxflow.md

@@ -43,7 +43,8 @@ It adds an edge oriented from the vertex `from` to the vertex `to` with the capa
 (2) Cap graph.flow(int s, int t, Cap flow_limit);
 ```
 
-- It augments the flow from $s$ to $t$ as much as possible. It returns the amount of the flow augmented.
+- (1) It augments the flow from $s$ to $t$ as much as possible. It returns the amount of the flow augmented.
+- (2) It augments the flow from $s$ to $t$ as much as possible, until reaching the amount of `flow_limit`. It returns the amount of the flow augmented.
 - You may call it multiple times. See [Appendix](./appendix.html) for further details.
 
 **@{keyword.constraints}**

document_ja/maxflow.md

@@ -44,7 +44,7 @@ int graph.add_edge(int from, int to, Cap cap);
 ```
 
 - (1) 頂点 $s$ から $t$ へ流せる限り流し、流せた量を返す。
-- (2) 頂点 $s$ から $t$ へ流量 $flow_limit$ に達するまで流せる限り流し、流せた量を返す。
+- (2) 頂点 $s$ から $t$ へ流量 `flow_limit` に達するまで流せる限り流し、流せた量を返す。
 - 複数回呼ぶことも可能で、その時の挙動は [Appendix](./appendix.html) を参照してください。
 
 **@{keyword.constraints}**